AT THE SAME time the Internet’s nurturing of niche cultures is contributing to what Cass Sunstein calls “cyberbalkanization.” Individuals can design feeds and alerts from their favorite Web sites so that they get only the news they want, and with more and more opinion sites and specialized sites, it becomes easier and easier, as Mr. Sunstein observes in his 2009 book “Going to Extremes,” for people “to avoid general-interest newspapers and magazines and to make choices that reflect their own predispositions.”

All too often, however, the recycling and cut-and-paste esthetic has resulted in tired imitations; cheap, lazy re-dos; or works of “appropriation” designed to generate controversy

“Reading in the traditional open-ended sense is not what most of us, whatever our age and level of computer literacy, do on the Internet,” the scholar Susan Jacoby writes in “The Age of American Unreason.” “What we are engaged in — like birds of prey looking for their next meal — is a process of swooping around with an eye out for certain kinds of information.”

At the same time, once digitized, books can be unraveled into single pages or be reduced further, into snippets of a page. These snippets will be remixed into reordered books and virtual bookshelves. Just as the music audience now juggles and reorders songs into new albums (or "playlists," as they are called in iTunes), the universal library will encourage the creation of virtual "bookshelves" — a collection of texts, some as short as a paragraph, others as long as entire books, that form a library shelf's worth of specialized information. And as with music playlists, once created, these "bookshelves" will be published and swapped in the public commons.

On this screen, now visible to one billion people on earth, the technology of search will transform isolated books into the universal library of all human knowledge.

(This is to be expected. The fact is, entire industries and the fortunes of those working in them are threatened with demise. Newspapers and magazines, Hollywood, record labels, broadcasters and many hard-working and wonderful creative people in those fields have to change the model of how they earn money. Not all will make it.)